Water-gage valve



(No Model.) 2 Sheets-Sheet l.

J. L. NELSON & A. F. LAUDBRHOLM. WATER GAGE VALVE.

No. 355,098. Patented Deo. 28. 1886.

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J. L. NELSON 88A. E. LAUEEEEOLM.

WATEE GAGE VALVE..

(No Model.)

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A VHA I -"d d 2' g A y l I a l UNITsD STATES 'PATiuvT OFFICE..

JOHN L. NnLsoN'ANDANDnEW F. L'AUDERHOLM, or CHICAGO, ILLINols.

wines-comet:` VALVE.

SPECIFICATION forming part of Letters Patent No. 355,098, dated December.28., 1886.

Application led September 30, 1885. Serial No. 178.648. (No model.)

.To all whom it may concerm `Be it known that We, JOHN L. NELSON andANDREW F. .LAUDnnHoLm the former a citizen of the United States andthelatter a sub- 5 ject of the King of Sweden, residing atl Chicago, in thecounty of Cook and State of Illinois, have invented certain new'anduseful Improvements in Valves-for Steam and Water Gages, of which thefollowing is a specifica- '10 tion, to wit: l

'This invention relates to valves for steam and water gages; and it'consists in the peculiar construction and arrangement of the same,`substantially as will be'hereinaftermore fully .I5 set forth andclaimed.'

In order to enable others skilled inthe art towhich our inventionappertainsto make and use the same, we will now proceed to describe itsconstruction and operation, referringto the rg0 accompanying drawings,in which- Figure lis a vertical section of a water and i steam gage;Figf2, a similar view of a slightlydifferent form of gage, and Figs. 3and 4 are detail views of parts of the invention.

25 A'represents determining the waterin a water gage for steam-boilerorsimilarplace.4 `lilacllshell Ais1;

3.5 provided 'wi h a valve, q'havig sistem, af,"

which slides freely 4ina-suitable' paeki.ng-box,' a, and has a handle,a, on its ontstond-,to en= able it to be operated byha'nd whendesirable.-

It will be observed that the shell Ais formed 4o witha shortpassa'ge orthroat, b,between its" valve-seat and the end ofthe whichisbi smaller ydiameter than, either the'l tibe -ojr the shell behind-fthejseat, -andwill in consequence pass' -a smaller quantityof steamer Waiertlian".

The obj-ect Vof eqntraenngtne fnbatist db;

struct thefreee-ofanll'the'steam andwag' ter brought to' hispoint-'bythgcnnections, and thus :when a `glessrbreaks cause an in= $0creased pressure behind the valve, more eertsinly and firmly' pressingit downftogits seat,r u v i I '1f-' I its? ensulrrabewntheplug'angiithegthe shell of a valve,which is of any desied' or convenient form, havinga seat, a,which 1n Fig. 1 is shown as conical, and' in as a raised ring,against whichaud thetwo' valve-shells 'A are'eon" nected'bya glass tube,A', to. form a steainand y 'main' p when in use-'and steam has 'beenraised upon the boiler, the opening of oncof these 4valv-wll allow thesteam or water to rush 55 in and `'open the other 'ne, when, as thesteam and water lill the gage-tube and the pressure l therein becomesthe same asin the boiler, the

pressureon the seating face of each valve is greater thanon its rear,because of the greater 6o area of this face, andthe valves are thereforeheld open as long as pressure remains on the boiler or the gage remainsintact. ,Should the glass be broken, as often occurs, the steam and`waterand the pressure therein' are at once re 65' lieved, and' as thesteam and water behind the valves rushout through the throat bin lessquantities thantheyare supplied or can be carried oli', the extra amountrepresents a pressure that acts'on 'the rear of the valve and at once-7o closes it. This occurs almost instantly upon the breaking of a glass,and no steam or water escapesinto the rooin, and yno danger is in-'curred byattempting to close the valves, they 'beingautomatic in theiraction. 7 5

`In order that the valveshall not be opened farther, than isnecessary'toits proper operation, well as to prevent the escape of steam4aroundthe sliding stem, I .provide the latter with a'snlall collar,b",' w`hich seatsitsel'f like a 8o valve on -a'seat, v1),jasthe'valve-is drawn back, andthis collar isiidjusted by means of ascrew,thread, b",on.the stem'tolregulate the throw of thcvalve to the lastdegree. l v v To thelower portionof the gage issecured a 8 5 blow-off,-CJ which is also provided, Witha-slidingvaIYe-andswm, such'asdescribedv inthe t of the gage, andwhile this is opened 4 ,by thettendajnt it is closed automatically by thelpressre, justdesfcribe'dfv`90 In Figs.'2 and -3 -is represented algage of slightlyidi'erentform'fronithat already, speci Shed, but-constrcted-n-pon exactly thesamel "principle f In'this the .valve,i nstead ofV being "conicaljjsatonitsseating face', and-isprofg5V vided withapacking, d, "ot soft`metal or other g. material, vtofforma.more perfect seat andpre? f'vett eescape off'steam'; but: this, asinjthe 'first case, has a limitedthrownorder to'rep- Vderthe pjressurennequal 1in of .brejzatkagev ma and' the.th-roei? isfurther contractedlbyemeansfrom theface of the'valve, andforming or leav. ,r

throat, which space allows suicient steam to retain the pressure in theunbroken glasstu be. This readily allows of the proper communicationbetween the boiler and glass when all is 5 in shape; but the plug socontracts the throat in capacity that when a glass breaks and thepressure is relieved from the outer end of the plug the action and electof this is the same. as that before referred to, andthe plug may be 1oattached io the conical valve also, if so desired, and renders the tineadjustment of its movement of less consequence.

The valve-shell A is in Fig. l formed below its stufiing-box with agroove, e, to receive the drip from any condensation of leaking steamwhich may accumulate around the sliding valve-stern, and on one sidethis groove is provided with a spout, e, to conduct these dripI4 pingsoff where they will not drop upon and 2o injure the gage-tube.

Whilethe valve is described and is especially adapted to gages, itisreadily applied to other purposes, as tlie form shown in the blow-off Cwill indicate,and theshape ofthe valve and seat is not niateriahand maybe changed at will, so the contraction of the capacity ofthe throat ismaintained to render the valve automatic in its action. Gages are oftenplaced at points which by height or location render theln in- 3oconvenient to reach, and in that case we attach to each valve-stein apull-cord, which is led to a convenient point and used to pullthe valvesopen, as will be at once understood by reference to Fig.' 1.

The adjustable collar'b, acting as a'valve to seat tightly around thesliding stein and maintain a steamtight joint, we prefer to seat, as

seen i'n Fig. 4, upon a soft-metal paokingsur-- face, b, held in placeby a screw-ring, b5, and 4o which may be renewed at any time.

Having thus fully described our invention, what we claim as' new, anddesire to secure by Letters Patent, is-

1. In a steam and water gage, a shell having a valve-seat and throatformed therein, in combination with a slidingssteni valve provided witha cylindrical plug on its face projecting into said throat, leaving onlya narrow annular free space for the passage ofthe Iluid, substantiallyas and for the purpose set forth.

2. rlhe combination,with a valve-shell, ci' a sliding-stem valve havingits stem provided with an adjustable collar seating against said shellwhen the valve is open,whereby the throw ofthe valve is adjusted asdesired, substantially as and for the purpose set forth.

3. A valve shell formed with a groove around it below its stalling-boxto receive the drip from steam leaking around fthe valvestein,substantially as shown and described.

4. In a steam or water gage, the combination,with the glassgagetubeandthe valves at either end, ota drip-receptacle formed in the uppervalveshell and a spout connected therewith to conduct the drippings awayfrom the tub, substantially as and for the purpose set i'ort 1.

5. The valve-shell A, formed with a seat, a, and provided with astuiiingbox, in combination with'the valveaz, having astexn, aa, slidingin said box, the thread b3, and adjustable collar b thereon,substantially as and for the purpose set forth.

6. The combination, wit-h the valve-shell A x JOHN L. NELSON. ANDREW F.LAUDERHOLM.

Witnesses:

W. C. MCARTHUR, CHAs. KREssMANN.

Correction in Letters Patent No. 3 55,098.

Itis hereby certified that the name of oneof the patentees in LettersPotent No. 355,098, grented December 28, 1886, for an improvement inWater-Gage Valves, was erroneously written and printed Andrew F.Lauderhoim, whereas said name should have been written and printedAndrew F. Landerholm; and that said Lettera Patent should be read viththis correction therein that, the same may conform to the record of thecase in the Patent Office.

Signed, countersigned, and sealed this 18th day of January, A. D. ISST.

[SELL] D. L. HAWKINS,

Acting Secrelmy Qf the Inferior. Countersigned:

LL B. VANCE,

Acting Commissioner of Patents.

